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Now you can find out what iconic moments in history you would have witnessed if this was the case, with our Reverse History tool below.

The tool takes your birthday and then works out how old you would have been at key moments in history if time ran in reverse.

For example if you are 40 years old, born in early 1978, you would have been just eight years old when Neil Armstrong became the first man to walk on the moon and in your early teens when John F Kennedy was assassinated.

The gadget will tell you what "today's" date would be if you'd lived our current life backwards from your birthday, and you can delve further into history if you wish.

There are landmarks from world history, entertainment, sport and much more.